When I was pregnant with DS my grandmother made the rather unkind (although not untrue) comment that DH was looking more pregnant than me. Personally, I blame too much food and too little exercise, but maybe there's something in the 'sympathy symptom' theory too!

I always tease DH that he has the pregnancy symptoms I'm supposed to have; flatulence in particular... But seriously, every pregnancy-related problem I have, he always seems to get too. If I say 'my back's really sore today' I get a detailed account of how his back has seized up. He's also had nausea, headaches and bad nights' sleep in tandem with me. Unfortunately I'm usually less than sympathetic... not that it stops him complaining!